Validation Studies of the Single Question physical activity questionnaire

Rose et al. 2008

See reference #101

Methods

Single-item screening question to identify physically inactive adults compared to validated NZPAQ. (Sensitivity, specificity, likelihood ratios, positive predictive value, and Kappa statistics calculated)

Sample

1171 women aged 51-74 years

Summary Results

Did less than 150 minutes in the last 7 days

	722 (61.7%)
True positive responses (inactive)	554 (47.3%)
True negative responses (active)	364 (31.1%)
% Sensitivity (95%CI)	76.7 (73.5–79.7)
% Specificity (95%CI)	81.1 (77.2–84.4)
Positive likelihood ratio (95%CI)	4.05 (3.33–4.93)
Negative likelihood ratio (95%CI)	0.29 (0.25–0.33)
Positive predictive value (95%CI)	86.7 (83.8–89.1)
Kappa statistic	*0.56, p < 0.001